Local measurement of the superfluid density in the pnictide superconductor Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ across the superconducting dome

Lan Luan, Thomas M. Lippman, Clifford W. Hicks +6

We measure the penetration depth ${\lambda }_{ab}(T)$ in Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ using local techniques that do not average over the sample. The superfluid density $ρ_s(T)\equiv1/λ…